Let's start with the uncomfortable truth: as of July 2026, the official Claude documentation for the third-party platforms does not describe a Claude-specific free tier or a fixed trial-credit amount on any of them. Claude model inference is paid, per token, from the first request. What people call "the free tier" is usually one of three different things — general cloud trial credits, genuinely free auxiliary endpoints, or a low spend ceiling mistaken for an allowance. Untangling them prevents both budget surprises and blocked proofs of concept.
Cloud trial credits: sometimes usable, sometimes explicitly excluded
Each cloud provider runs its own new-account credit programs, with amounts and expiry set by the provider — those terms live in each cloud's sign-up offers, not in Claude documentation, so check them directly with your provider. What the Claude docs do tell you is where credits cannot take you:
Microsoft Foundry is the strictest. Claude requires a paid Azure subscription with a pay-as-you-go billing method. Free trial, student, and credit-only subscriptions are not supported for Claude, sponsored subscriptions using only Azure credits are called out as unsupported, and Free Trial subscriptions get a rate-limit allocation of zero across the board. On Azure, there is effectively no free run at all for Claude.
Google Vertex AI requires a project with billing enabled before you can enable any Claude model in Model Garden, and enabling requires accepting Anthropic's Terms of Service. Whether general Google Cloud credits apply to partner-model usage is a question for your Google account team — the Claude-on-Vertex documentation does not promise it.
Amazon Bedrock has no documented Claude free allowance. On-demand pricing is charged per input and output token consumed, and first use of an Anthropic model auto-initiates an AWS Marketplace subscription tied to your paying account.
What is genuinely free
A handful of documented items cost nothing, and they are useful in a zero-budget evaluation phase:
| Free item | Detail |
|---|---|
| Token counting | The count_tokens endpoint is free, with its own rate limits (e.g., 2,000 requests/minute at the Start tier). Estimate costs before spending a cent on inference. |
| Files API operations | Upload, download, list, metadata, and delete are all free; you pay only when file content enters a Messages request as input tokens. |
| Web fetch tool | No additional charge beyond standard token costs for the fetched content. |
| Code execution allowance | 1,550 free hours per organization per month; beyond that, $0.05 per hour per container (and free entirely when used with the current web search/web fetch tool versions). |
Note the platform caveat: the Files API and code execution are first-party and Claude Platform on AWS features (beta on Foundry), not available on Bedrock or Vertex AI.
The ceiling people mistake for a free tier
On the first-party Claude API, new organizations land on the Start usage tier, which caps monthly spend at $500. That is a ceiling on what you can be billed, not an allowance of free usage — every token under it is still charged. When you hit the tier's spend cap, API usage pauses until the next month unless you request a higher limit. For a pilot, this is actually a feature: your worst-case month is bounded. You can also set your own spend limit below the cap in the Console (Settings > Limits). On Claude Platform on AWS, spend limits are not available — organizations stay on the Start tier for rate limits, and billing runs through AWS Marketplace, so cost control falls to AWS billing tooling.
Where to go next
Size the pilot with cost estimation and tokens explained, then plan the jump in from free tier to production. The quickstart shows the fastest paid path to a first call on each platform.